Cisco Cisco Packet Data Gateway (PDG)
Subscriber Configuration Mode Commands
▀ always-on
▄ Command Line Interface Reference, StarOS Release 18
8800
always-on
Once the idle timeout limit is reached, keeps the current subscriber session connected as long as the subscriber is
reachable.
reachable.
Caution:
When always-on is enabled, the subscriber must have an idle time-out period configured (default is 0,
no time-out). Failure to configure an idle time-out results in a subscriber session that is indefinite.
Two timers and a counter are associated with this feature. Refer to the
timeout
command in this chapter and the
ppp
echo-retransmit-timeout msec
and
ppp echo-max-retransmissions num_retries
commands.
Default: Disabled.
Product
PDSN
ASN-GW
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > Subscriber Configuration
configure > context context_name > subscriber { default | name subscriber_name }
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-subscriber)#
Syntax
always-on
no always-on
always-on
Specifies that the user will remain connected after the idle time expires.
no
Disables
always-on
. The user is disconnected after the idle time expires.
Usage
If this parameter is enabled for a subscriber, when the idle time-out limit is reached the subscribers IP/PPP
session remains connected as long as the subscriber is reachable. This is true even if the airlink between the
mobile device and the RN (Radio Node) is moved from active to dormant (inactive) status. When the idle
timeout limit is reached, the PDSN determines availability using link control protocol (LCP) keepalive
messages. A response to these messages indicates that the “always-on” status should be maintained. Failure
to respond to a predetermined number of LCP keepalive messages causes the PDSN to tear-down
(disconnect) the subscriber session.
session remains connected as long as the subscriber is reachable. This is true even if the airlink between the
mobile device and the RN (Radio Node) is moved from active to dormant (inactive) status. When the idle
timeout limit is reached, the PDSN determines availability using link control protocol (LCP) keepalive
messages. A response to these messages indicates that the “always-on” status should be maintained. Failure
to respond to a predetermined number of LCP keepalive messages causes the PDSN to tear-down
(disconnect) the subscriber session.
Example
Enable always on for the current subscriber by entering the following command: